Perhaps you should try some spelling variations:
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
ve bac » ve bao, ve cac, ve ban
bo van » vo van, do van, ho van
so van » su van, vo van
vi cuu » vinh cuu
vi luu » vi lua
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang x hoi. hieu ve bac ((bo van) OR (so van)) hanh ((vi cuu) or (vi luu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang x hoi. hieu ve bac ((bo van) OR (so van)) hanh ((vi cuu) OR (vi luu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang x hoi. hieu ve bac ((bo van) OR (so van)) hanh ((vi cuu) or (vi luu)) tre".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang x hoi. hieu ve bac ((bo van) OR (so van)) hanh ((vi cuu) or (vi luu)) tre*.